Thursday

July 24, 2014

July 24, 2014

Total # Posts: 237

**Trigonometry**

If the distance covered by an object in time t is given by s(t) = t^2 + 5t , where s(t) is in meters and t is in seconds, what is the distance covered in the interval between 1 second and 5 seconds?

**Physics**

Sorry, there was a typo. *51 degrees opposite the 150 cm side.

**Physics**

What is the value of each of the angles of a triangle whose sides are 95, 150, 190 cm in length? I have tried to do this problem, don't get me wrong, but I don't really know where to go. Can someone tell me how to even approach this problem? The textbook states that th...

**Math**

Roberto Wins- 1/4 Roberto Loses- 3/4

**english**

Your question is confusing. Please go further in detail.

**Ratio of two triangles**

What would the ratio be if the first triangle has sides of 4cm, 8cm, and 12cm and the second triangle had sides of 1cm, 2 cm, and 3 cm? Would the ratio be 4:1 or 1:1/4?

**Physics**

please help asap

**Physics**

A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter is 70 % of the way u...

**Math**

A(n)=A(n-1)-4;a(1)=8

**Science**

Hannah is comparing a rock from a riverbed and a rock from deep underground. One is very smooth, and the other has very rough edges. Explain why each rock was probably found in that location.

**Earth Science**

ummm A?

**Earth Science**

My first guess was A but then i read B this is confusing

**Math Help**

Was #1 correct?

**Math Help**

I got #1 C, #2 D and #3 $6.50?

**Math Help**

1.) You have $22 in your bank account, and you deposit $11.50 per week. Your cousin has $218 in his bank account and is withdrawing $13 per week. The graph of this problem situation intersects at x=8. What does this mean? A. In 8 weeks, you will have triple the amount of money...

**physics**

alkjfalkjfadfa

**CHEMISTRY**

How to prepare a 500ml 0.2M NaOH solution from 2.0M NaOH solution

**Stats**

A production process produces an item. In a recent study, the company found that 20% of all items produced were defective. Each item is inspected before being shipped. 10% of the items were misclassified( labeled as defective when they were good or labeled good when they were ...

**Statistics**

A production process produces an item. In a recent study, the company found that 20% of all items produced were defective. Each item is inspected before being shipped. 10% of the items were misclassified( labeled as defective when they were good or labeled good when they were ...

**science**

an object with a volume of one cu ft , weighing 150 lbs. is embedded in the sediment at a depth of 99 fy. in the ocean harbor. the object is best lifted to the surface by

**Macroeconomics**

Graph the following aggregate supply and demand curves (be sure to draw to scale). Real GDP (in $ trillions) Price Level Supplied Demanded Increase / Decrease 100 4 16 110 10 15 140 14 12 200 15 6

**Math**

An airplane is flying at a velocity of 300km/h S30degW in a wind blowing at a velocity of 50km/h S20degE. What is the true speed and direction of the plane?

**chemestry**

How many grams of O2 are needed to produce 45.8 grams of Fe2O3 in the following reaction? 4Fe(s)+3O2(g) - 2Fe2O3(s)

**quantitative rsearch**

A manufacterer of computers designed to aid social scientists in analyzing rsearch data claims that are operational for at least 80% of the time . during the course of the year one computer was operational for 270 days. test, at the 1% CONFIDENCE LEVEL, whether the manufacture...

**physics**

IF A 0.5 Kg baseball(at rest) is hit by a bat with a force of 200.0 N what is the magnitude of the baseball just as it is leaving the bat?

**Science(applied physics)**

vi= 18 m/sec constant vj= 24-gt= 24-9.8*6= 24-58.8= -34.8 m/sec v^2= vx^2+vy^2= 18^2+(-34.8)^2=1535.04 KE= 1/2mv^2 KE= .5*1*1535.8= 767.9 joules

**Physics**

Time for asteroid = (RadiusEarthOrbit/RadiusAsteroidOrbit)^3/2 * Time for Earth Ta= (475/150)^3/2 *1 = 5.54 yr

**Pre Calculus**

There are ten equal parts to a circular track for 2 toy cars and the distance from the inner to the outer is 3.4 inches. What is the width of the track?

**maths**

both my hundreds and units digits are one-half of my tens digit.the sum of my three digits is 16. what am i?

**Physics**

Differenciate between speed and velocity

**physics**

A 224 g particle is released from rest at point A along the diameter on the inside of a fric- tionless, hemispherical bowl of radius 44 cm. The acceleration of gravity is 9.8 m/s2 .

**Physics**

A bead slides without friction around a loop- the-loop. The bead is released from a height of 12.9 m from the bottom of the loop-the- loop which has a radius 4 m. The acceleration of gravity is 9.8 m/s2 . A 4m 12.9 m What is its speed at point A ? Answer in units of m/s

**Physics**

You have a 40 inch wheel tow 20 inch wheel to a 5 inch wheel how many revolutions does the 5 inch wheel have to make to make the 49 inch wheel rotate 1revolution?

**Physics**

A 345N load is suspended from a cable. What is the acceleration of the load if the tension in the cable is 275N£¿

**Algebra**

solve by elimination: 6a+2b = -48 -6a+b = 57 What is the solution set ( , )?

**Math241**

How do I solve x^2+4y^3=-828 at pont (-6,-6) The slope=

**Pre-Calc**

f(x)=(24x3+68x2+24x−32)/(4x3+56x2+236x+280) I need help finding the roots and the hole for this problem.

**Math**

A salesperson sold 4 cars for a total value of 54,000 dollars. Her co-worker sold 8 cars for a total the value of d dollars. Write an algebraic expression that represents the combined value of the cars sold by the salesperson and her co-worker?

**Physics**

whoops, I noticed I used 3.4 seconds not 3.14 y= .5*9.8* 3.14^2= 48.31

**Physics**

If ball1 has been dropping for 3.4 seconds, then ball1 has dropped: y= vo*t+(1/2)*g t^2 where vo= 0.0 since is was "dropped", not thrown. or y=.5*9.8*3.49^2= 59.68meters

**terminal velocity**

A que ball dropped from a third floor window will reach what speed/velocity? Is that high enough to reach terminal velocity?

**math**

Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra? 200 words or better

**Government**

If you asked the same question about an upcoming election to many people,you would be conducting a? A.Scientific poll B.Straw Vote C.Public Agenda D.Representative Sample

**Physics**

It's all good to say that Brandon but the fact is you googled as well and came to this link. Hahahahaha

**Science**

I need help in Science Project. The topic is called "How does the size affect the force of magnetism". I didn't see any procedure in how to do this particular topic can you help me?

**Statistics**

The Deborah Heart Institute performs many open-heart surgery procedures. Recently research physicians at the Institute developed a new heart bypass procedure that they believe reduces the average length of recovery. The hospital board will not adopt the procedure unless there ...

**Maths**

14 metres of rope costs €9.52. If Joe bought 21 metres, how much change out of €20.00 do Joe get? Is there a shorter way of doing this other than dividing, multiplying and then subtracting?

**algebra**

4r - 10r + 24

**algebra**

The solution to this i believe is no solution need help. -2x+2>-2x-3

**spanish**

Translate to english? Viajaré al Caribe el próximo verano. En este momento estoy terminando mi tarea. La próxima semana visitaré a mi abuela. Hace un mes comenzaron las vacaciones de verano. Hace media hora comenzó a llover.

**chemistry**

Oh reacts with Ca which decreases [Ca] and pushes reaction right CaC2O4<>Ca+C2O4

**History**

thank you

**History**

Both were a cry for independence and freedom. Is that correct

**History**

How was the writing of the Grito de Dolores similar to the writing of the petition by the First Continental Congress?

**Algebra**

(8.1 . 10^8) . (4.2 . 10^3)

**FRATION**

12/345

**Math-Statistics**

Find a confidence interval for ƒÊ assuming that each sample is from a normal population. a. P x = 14, ƒÐ = 4, n = 5, 90 percent confidence b. P x = 37, ƒÐ = 5, n = 15, 99 percent confidence c. P x = 121, ƒÐ = 15, n = 25, ...

**physics**

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6 106 m/s?

**Physics**

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?

**Physics**

If Galileo and his assistant were 16 km apart, how long would it take light to make the round-trip? How does this time compare with reaction times of about 0.4 s?

**Retired 71 years old**

If I borrowed $78,000 from a bank and had perfect credit; How much interest would I have to pay in Dollars and cents? The loan is for 7 years

**English**

Rewrite the passage below correcting any errors of grammar and usage The mechanic drove out the car to Joe that was lubricated. As a matter of fact, he has not done enough on it as Joe has expected. But whatever it was he decides to take it like that. The experience with the m...

**geometry**

What happened when two fruit companies merged?

**Geometry**

Name the properties that justify the steps taken. AB=EF; thereforeAB+CD=EF+CD

**Physics**

What is the fundamental frequency for a 62 cm banjo string if the speed of waves on the string is 470 m/s?

**Physics**

How long is a wavelength of infrasound with a frequency of 4 Hz?

**Physics**

Radio waves travel at the speed of light, which is 3.00 108 m/s. What is the wavelength for a FM station broadcasting at 105.9 MHz (the prefix M is "mega" and means 106)?

**Physics**

What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?

**statistics**

the mean is based off of 3 months. multiply it out to get the mean for a correct time period (1.5x4=6). I use the Poisson function in excel. Mean is equal to 6 and x is equal to 12 and 0. True is up to a certain number (up to 12) and false is exactly a certain number (exactly ...

**Chemistry**

Well Kae, 3KOH + Fe(NO3)3 -> 3KNO3 + Fe(OH)3

**physics**

A student of weight 990 N was sent to another planet called Nerdland. If Nerdland has a mass that is three times the mass of the earth and a radius that is half the radius of the earth, what would be the mass in kg of the student when on Nerdland?

**math**

a 4 digit number my 2 nd digitis twice my 3 digit the sum of all my digits is 3 times greater than my last digit the productof my 3rd and 4th digits is 12 times greater than the ratio of my 2nd to 3rd whats my number?

**math**

solve by the elimination method: 9x-9y=18 7y-3x=-8 please solve step by step thank you for your help

**chemistry**

Calculate the number of moles of FeSO4 in 25cm3 of a 0.2mol dm3 solution

**Chemistry **

A gas has a volume of 50.0 cm3 at a temperature of -73°C. What volume would the gas occupy at a temperature of -123°C if the pressure stays constant

**math**

The best answer is D - 6. The two negatives cancel each other out, making the sum 18 divided by 3, equaling 6.

**college chem**

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10...

**physics**

What is the average current through a conductor that carries 4 375C during a 2 min time period?

**english**

What opinion might they have of the author? What could you as a writer do to prevent this problem?

**english**

How might readers react if the topic sentences in an essay did not coincide with the supporting points, and why would their reaction be justified?

**business**

Direct verse indirect cost Estep Construction Company is composed of two divisions: (1) Home Construction and (2) Commercial Construction .The Home Construction Division is in the process of building 12 houses and the Commercial Division is working on 3 projects. Cost items of...

**chem101**

propyl Bromide reacts with Mg, Propanone, H+ to yeild what?

**chem101**

Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.

**The world History**

where are the questions to assignments 1-5 world history number007678

**chem**

What is the [OH-] for a solution at 25°C that has [H3O+] = 8.23 × 10-2 M?

**Chemistry**

What volume of dry hydrogen would be produced under standard consitions when 0.250g of magnesium reacts with excess HCl?

**Math**

The surface area of a cylinder is 200cm. The diameter is equal to the height. Find the radius.

**Math**

The surface area of a cylinder is 200cm. The diameter is equal to the height. Find the radius.

**Math**

Do the equations x = 5y + 3 and x = 5y – 3 have the same solution? How might you explain your answer to someone who has not learned algebra?

**algebra**

what are the coordinates of the points at which the slope of the function with the equation y = x^4 - 8x^2 is equal to zero ?

**physics**

Two boxes are similar. The larger box has a volume that is 64 times the volume of the smaller box. What is the ratio of the larger box's height to the smaller box's height? write the fraction as a decimal

**3rd grade**

What is a number sentence that shows the same product as the product of 9 and 2

**chem class**

A 25.00-mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 10.0 mL of KOH is ???? M.

**comp**

what is the verb tense in this sentence? Education is contributing a good role of successful financial planning.

**5th gr ade social studies**

each european group that set up colonies settled in a specific part of americas fact

**answer**

1/m-m/2=6X+5/12

**Physics Lab I**

Let's say you measure an average acceleration to be 0.4134 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs. ?? cm Use three ...

**Chemistry check my answer?**

Hi! is my answer correct? Consider the following chemical reaction: H2 (g) + I2 (g) <> 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. The value ofKeq for this reaction is I solved by...

**adult education**

we have a ring that has an indian head marking on the inside of the ring, do you know what it means, who made it, how old it is, or what its actually called so we can search the meaning ?